Towel bar



FIG. 1 is a top, front and side perspective view of a towel bar showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a side elevational view thereof.

The broken-line disclosure of elements in the views is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a towel bar, as shown and described. 